how to draw a quadratic equation

how to draw this quadratic equation, when I tried to draw it it gives me a linear draw :(

syms x

y=(-53.68/(2*230))*((x).^2)+500.0089*x+55

figure

fplot(y,[-55 55])

grid

Answer 1

[Star Strider]

It is definitely close to linear in the region you are plotting it.

To plot it and see its quadratic shape, find the inflection point and use that as the centre of the plot range.

Try this —

syms x 
y=(-53.68/(2*230))*((x).^2)+500.0089*x+55

y = 

y_inflpt = vpasolve(diff(y)==0)

y_inflpt = 

2142.3630216095379293298534164136

figure
fplot(y,[-55 55]+double(y_inflpt))
grid

.